PhD Scientific Days 2024

Surgical Medicine

The Biomechanical Effect of Lumbopelvic Distance Reduction on Reconstruction After Total Sacrectomy: A Comparative Finite Element Analysis of Four Techniques

Előadó neve

Mr. Turbucz, Máté

Neptun code

RMB8D9

Előadó munkahelye

National Center for Spinal Disorders, In Silico Biomechanics Laboratory

Előadó telefonszáma

06306866662

Előadó e-mail címe

turbucz95@gmail.com

Az előadás címe

The Biomechanical Effect of Lumbopelvic Distance Reduction on Reconstruction After Total Sacrectomy: A Comparative Finite Element Analysis of Four Techniques

Szerző(k) neve és munkahelye

Mate Turbucz¹, Agoston Jakab Pokorni¹, Peter Endre Eltes², Aron Lazary³

1: National Center for Spinal Disorders, In Silico Biomechanics Laboratory, Budapest; School of PhD Studies, Semmelweis University, Budapest
2: National Center for Spinal Disorders, In Silico Biomechanics Laboratory
3: National Center for Spinal Disorders

Bemutatás módja

Szóbeli

Szekció

Surgical Medicine

Language of the presentation

Hungarian

Preferred session

Surgical Medicine

Összefoglaló szövege

Introduction: Following total sacrectomy, lumbopelvic reconstruction is essential to restore continuity between the lumbar spine and pelvis. Although many lumbopelvic reconstruction techniques (LPRTs) have been previously analyzed, the biomechanical effect of lumbopelvic distance reduction (LPDR) has not been investigated yet.
Aims: To evaluate and compare the biomechanical properties of four LPRTs while considering the effect of LPDR using the finite element (FE) method.
Methods: The FE models following total sacrectomy were developed to analyze four LPRTs, with and without LPDR. The closed-loop reconstruction (CLR), the sacral-rod reconstruction (SRR), the four-rod reconstruction (FRR), and the improved compound reconstruction (ICR) techniques were analyzed. Lumbopelvic stability was assessed through the shift-down displacement and the relative sagittal rotation of L5, while implant safety was evaluated based on the stress values at the bone-implant interface and within the rods.
Results: Regardless of LPDR, both the shift-down displacement and relative sagittal rotation of L5 consistently ranked the LPRTs as ICR<SRR<FRR<CLR, with ICR being the stiffest for both parameters. LPDR decreased both the shift-down displacement and the relative sagittal rotation values. Due to LPDR, the stress values at the bone-implant interface values were reduced by 31% in flexion, by 17% in extension, by 29% in lateral bending, and by 29% in axial rotation. In addition, LPDR lowered the stress values within the rods by 16% in flexion, by 9% in extension, by 11% in lateral bending, and by 12% in axial rotation.
Conclusions: LPDR significantly improved both lumbopelvic stability and implant safety in all reconstruction techniques after total sacrectomy. LPDR reduced the shift-down displacement, the relative sagittal rotation of L5, and the stress values at the bone-implant interface. Furthermore, in the ICR and SRR techniques, LPDR decreased the maximum stress values within the rods. All four investigated LPRTs demonstrated suitability for lumbopelvic reconstruction, with the ICR technique exhibiting the highest lumbopelvic stiffness.
Funding: Project no. KDP-14-3/PALY-2021 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the KDP-2020 funding scheme.

University

Semmelweis University

Supervisor

Peter Endre Eltes, MD, PhD

Publication of my abstract

I do not give consent to the publication of my abstract on the website of the congress.

Kind

Szabad

Status

elfogadva

Accepted presentation method

szóbeli

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

6039

Start

14:30

End

14:40